Bobbin clutch



Dec. 25, 1923.

yG. H. MAGRATH BOBBIN CLUTCH Filed May 4, 1923 Hr-tarm Patented Dee.1.6.1923.vv

Application ined nay eusse. semi 1ro. eaaese.

To all whom it may concern:

Be it known that I, GEORGE H. MAGRATH,

A a citizen of the United States, residing at Whitinsville,in the countyof Worcester and State of Massachusetts, have invented a new and usefulBobbin Clutch, of which the following is a specification.

This invention pertains to a spindle of the common type used inspinning, twisting and other textile Aoperations and relatesparticularly to an improved device forcentering and driving a bobbinmounted thereon.

It is the general object of my invention to provide an improvedconstruction of bobbin clutch by means of which the bobbin may beaccurately centered and eifectively rotated.

A further object of my invention is to provide a bobbin clutch which issimple in construction, economical to manufacturev and in which theparts cannot be easily displaced or broken. v

in the preferred form, the movable parts are fully enclosed andprotected by a strong tubular casing.

My invention furtherrrelates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

A preferred form of the invention is shown in the drawings in which Fig.1 is an elevation of a spindle with my improvements shown in section,taken along the line 1-1 in Fig. 4;

Fig. 2 is a side elevation of thev bobbin-engaging or clutch membersbefore they are bent to circular form;

Fig. 3 is a sectional view taken along the line 3 3 in Fig. 2;

Fig. 4 is a plan view of the clutch members after they'are bent tocircular form;

Fig. 5 is a sectional plan view, taken along the line 5--5 in Fig. 1;and

Fig. 6 is a partial side elevation of my improved bobbin clutch.

Referring to the drawings, ll have shown a spindle of the usual type,comprisinga spindle blade 10 and a whorl or pulley 11 having a bobbinsupporting shoulder 12. A tubular casing member 13 is iirmly mounted onthe blade 10 and at its lower end is preferably seated in a recess inthe shoulder 12 of the pulley 11.

rFhe bobbin-engaging or clutch members 14 are preferably formed from asingle piece of resilient sheet material having the outline indicated inFig; 2 and having the intermediate portion of each member 14 displacedoutwardly at 15. The ends of the members 14are 'connected bv bands-16and the combined structureis bent to circular form, as clearly shown inFig. 4.

The casing-13 is providedl with a series of holes or openings 17 in itsside wall at points intermediate its length and the parts are assembledby forcing the clutch members 14 into the lower end of the casing 13until 'the prpjections 15 are aligned with the openings 1 Thering-shaped bands 16 at the opposite ends of the clutch members 14preferably engage and are firmly seated against the innercylindricalwall 0f the tubular casing 13.

The normal position of the parts is indicated in Figs. 1 and 5, with`the middle p0rtions limited in their outward movement by engagement ofthe clutch members with the inner wall of the casing 13.

lVhen a'bobbin is placed on the spindle, the projections 15 areyieldingly forced inward to a greater or less extent to permit theseating of the bobbin, and thereafter yieldingly engage and effectivelydrive the bobbin and at the same time center the bobbin on the casing13. it will be noted that the clutch members are iirmly supported bothabove and below their driving points and that they are also fullyprotected by the strong casing 13, so that accidental injury is almostimpossible.

Having thus described my invention and the advantages thereof` ll do notwish to be limited to the details herein disclosed otherwise than as setforth in the claims, but what 1 claim is 1. A spindle having, incombination, a spindle blade, a tubular casing mounted thereon andhaving a plurality of spaced openings in its side walls at anintermediate point in its length, and a plurality ofresilient clutchmembers each engaging and positioned by said casing both above and belowone of said openings and each having an outwardly extended intermediateportion projecting through one of said openings to engage and drive abobbin mounted on said spindle.

2. A spindle having, in combination, a spindle blade, y a tubular casingmounted thereon and having a plurality of spaced openings in its sidewalls at an intermediate point in its length, and a plurality of clutchmembers fixed against the inside of said casing both above and belowsaid openings and having outwardly extending intermediate portionsprojecting through said openings to engage and drive a bobbin mounted onsaid spindle. K

3. A spindle having, in combination, a spindle blade, a tubular casingmounted thereon and having a plurality of spaced openings in its sidewalls at an intermediate point in its length, and a plurality of clutchmembers mounted within said casing, said clutch members being joined attheir opposite ends by ring-shaped supporting portions located bothabove and below said openin s and said clutch members having outwardlylextended intermediate portions projecting through said openings toengage and drive a bobbin mounted on said Spindle.

4. A spindle having, in combination, a spindle blade, a tubular casingmounted thereon and having a plurality'ofspaced openings in its sidewalls at an intermediate point in its length, and a plurality of clutchmembers formed from a single piece of resilient sheet metal bent toprovide ringshaped supporting portions at both ends of said clutchmembers, said portions connecting said members and being firmly seatedin said tubular casing above and below said openings, and said membershaving outwardly displaced intermediate portions projecting through saidopenings to engageand drive a bobbin mounted on said Spindle.

In testimony whereof I have hereunto aiiixed my signature.

GEORGE H. MAGRATH.

